<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/welcome' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 消息提醒区域 -->
      <el-alert title="添加商品信息" type="info" center show-icon :closable="false"></el-alert>

      <!-- 进度条区域 -->
      <el-steps :active="activeIndex-0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- 标签页区域 -->
      <el-form
        :model="addForm"
        label-position="top"
        :rules="addRules"
        ref="addRef"
        label-width="100px"
      >
        <el-tabs
          tab-position="left"
          v-model="activeIndex"
          :before-leave="beforeLeaveTab"
          @tab-click="tabClicked"
        >
          <!-- 基本信息部分 -->
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="catList"
                :props="props"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <!-- 商品动态参数部分 -->
          <el-tab-pane label="商品参数" name="1">
            <el-form-item v-for="item in manyTabData" :key="item.attr_id" :label="item.attr_name">
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  border
                  v-for="(item2, index) in item.attr_vals"
                  :key="index"
                  :label="item2"
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <!-- 商品静态属性部分 -->
          <el-tab-pane label="商品属性" name="2">
            <el-form-item v-for="item in onlyTabData" :key="item.attr_id" :label="item.attr_name">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <!-- 上传商品图片部分 -->
          <el-tab-pane label="商品图片" name="3">
            <el-upload
              action="http://127.0.0.1:8888/api/private/v1/upload"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headersObj"
              :on-success="handleSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <!-- 商品内容介绍部分 -->
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器组件 -->
            <quill-editor ref="myQuillEditor" v-model="addForm.goods_introduce" />
            <el-button type="primary" class="addBtn" @click="addGood">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <!-- 图片预览对话框 -->
    <el-dialog title="图片预览" :visible.sync="picDialogVisible" width="50%">
      <img :src="prePicPath" alt class="preImg" />
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
  data() {
    return {
      // 进度条以及标签页激活项
      activeIndex: '0',
      // 基本信息表格
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_number: 0,
        goods_weight: 0,
        goods_cat: [],
        pics: [],
        goods_introduce: '',
        attrs: []
      },
      // 基本信息表单规则
      addRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' },
          { min: 2, max: 50, message: '长度在 2 到 50 个字符', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' }
        ]
      },
      //   分类列表
      catList: [],
      //   级联选择器的配置
      props: {
        expandTrigger: 'hover',
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      //   动态参数属性列表
      manyTabData: [],
      //   静态参数属性列表
      onlyTabData: [],
      // 撒上传图片请求头
      headersObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      //   图片预览对话框控制
      picDialogVisible: false,
      //   预览图片路径
      prePicPath: '',
      //   商品内容介绍绑定值
      introContent: ''
    }
  },
  created() {
    this.getCatList()
  },
  methods: {
    //   获取分类列表
    async getCatList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取参数列表失败！')
      }
      this.catList = res.data
      //   console.log(res)
    },
    // 级联选择器选中项变化
    handleChange() {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
      //   console.log(this.addForm.goods_cat)
    },
    // 阻止标签页的切换
    beforeLeaveTab(activeName, oldActiveName) {
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类')
        return false
      }
    },
    // 标签页被点击时
    async tabClicked() {
      // 访问动态参数面板
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(
          `categories/${this.addForm.goods_cat[2]}/attributes`,
          {
            params: { sel: 'many' }
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('获取参数列表失败！')
        }
        res.data.forEach(item => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(',')
        })
        this.manyTabData = res.data
        // console.log(res.data)
      }
      //   访问静态属性面板
      if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(
          `categories/${this.addForm.goods_cat[2]}/attributes`,
          {
            params: { sel: 'only' }
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('获取参数列表失败！')
        }
        // res.data.forEach(item => {
        //    item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(',')
        // })
        this.onlyTabData = res.data
        // console.log(res.data)
      }
    },
    // 处理图片预览效果
    handlePreview(file) {
      console.log(file)
      this.prePicPath = file.response.data.url
      this.picDialogVisible = true
    },
    // 处理删除图片
    handleRemove(file) {
      const filePath = file.response.data.tmp_path
      const i = this.addForm.pics.findIndex(x => x.pic === filePath)
      this.addForm.pics.splice(i, 1)
      // console.log(file)
      // console.log(this.addForm.pics)
    },
    // 监听图片上传成功
    handleSuccess(response) {
      const picInfo = { pic: response.data.tmp_path }
      this.addForm.pics.push(picInfo)
      // console.log(this.addForm.pics)
    },
    // 点击添加商品按钮 对表单进行验证
    addGood() {
      this.$refs.addRef.validate(async valid => {
        // console.log(valid)
        if (!valid) {
          return this.$message.error('请检查表单！')
        }
        // 表单验证成功后发出提交商品请求
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // 处理动态参数
        this.manyTabData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(',')
          }
          this.addForm.attrs.push(newInfo)
        })
        // 处理静态属性
        this.onlyTabData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        const { data: res } = await this.$http.post('goods', form)
        console.log(form)
        console.log(res)
        if (res.meta.status !== 201) {
          return this.$message.error('添加商品失败！')
        }
        this.$message.success('添加商品成功！')
        this.$router.push('/goods')
      })
    }
  }
}
</script>

<style lang="less" scoped>
.el-steps {
  margin: 30px auto;
  padding: auto;
  // text-align: center;
}
.el-checkbox {
  margin: 0;
  margin: 10px 15px;
}
.preImg {
  width: 100%;
}
.addBtn {
  margin-top: 20px;
}
</style>
